The metropolis of Lydia in Asia Minor. It stood on the river Pactolus, at the foot of mount Tmolus. Here was one of the seven Asiatic churches (Rev. 3:1-6). It is now a ruin called Sert-Kalessi.
Sardis
A good name and a dim flame can go together. To the church in Sardis, the risen Christ says, “thou hast a name that thou livest, and art dead.” His counsel is plain: “Be watchful, and strengthen the things which remain.” He tells them to remember what they first received, and to repent. Yet the letter does not end in blame, because he adds that there are “a few names even in Sardis which have not defiled their garments; and they shall walk with me in white.” Sardis is one of the seven churches listed in Revelation 1:11, and the letter itself begins at Revelation 3:1.
5 verses
Revelation
Revelation 1:11
Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send it unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea.
Revelation 3:1
And unto the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead.
Revelation 3:2
Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.
Revelation 3:3
Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.
Revelation 3:4
Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.
From Easton's Bible Dictionary
Matthew George Easton, 1897
From Smith's Bible Dictionary
William Smith, 1884
a city of Asia Minor and capital of Lydia, situated about two miles to the south of the river Hermus, just below the range of Tmolus, on a spur of which its acropolis was built. It was 60 miles northeast of Smyrna. It was the ancient residence of the kings of Lydia, among them Croesus, proverbial for his immense wealth. Cyrus is said to have taken ,000,000 worth of treasure form the city when he captured it, B.C. 548. Sardis was in very early times, both from the extremely fertile character of the neighboring region and from its convenient position, a commercial mart of importance. The art of dyeing wool is said to have been invented there. In the year 214 B.C. it was taken and sacked by the army of Antiochus the Great. Afterward it passed under the dominion of the kings of Pergamos. Its productive soil must always have continued a source of wealth; but its importance as a central mart appears to have diminished from the time of the invasion of Asia by Alexander. The massive temple of Cybele still bears witness in its fragmentary remains to the wealth and architectural skill of the people that raised it. On the north side of the acropolis, overlooking the valley of the Hermus, is a theatre near 400 feet in diameter, attached to a stadium of about 1000. There are still considerable remains of the ancient city at Sert-Kalessi . Travellers describe the appearance of the locality as that of complete solitude. The only passage in which it is mentioned in the Bible is (Revelation 3:1-6)